(19)
(11) EP 3 164 682 A1

(12)

(43) Date of publication:
10.05.2017 Bulletin 2017/19

(21) Application number: 15814401.4

(22) Date of filing: 06.07.2015
(51) International Patent Classification (IPC): 
G01F 23/26(2006.01)
(86) International application number:
PCT/US2015/039248
(87) International publication number:
WO 2016/004436 (07.01.2016 Gazette 2016/01)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME
Designated Validation States:
MA

(30) Priority: 03.07.2014 US 201462020725 P
02.07.2015 US 201514790355

(71) Applicant: Texas Instruments Incorporated
Dallas, TX 75265-5474 (US)

(72) Inventors:
  • MIATTON, Daniele
    I-27020 Carbonara al Ticino (IT)
  • CANCLINI, Athos
    I-22012 Cernobbio (IT)
  • LIU, Dongtai
    Fremont, CA 94539 (US)
  • FOMIN, Evgeny
    San Carlos, CA 94070 (US)
  • REISTSMA, George
    Redwood City, CA 94061 (US)
  • TARELLI, Riccardo
    I-23801 Calolziocorte (IT)

(74) Representative: Zeller, Andreas 
Texas Instruments Deutschland GmbH Haggertystraße 1
85356 Freising
85356 Freising (DE)

   


(54) CAPACITIVE LIQUID LEVEL MEASUREMENT WITH DIFFERENTIAL OUT-OF-PHASE CHANNEL DRIVE TO COUNTERACT HUMAN BODY CAPACITANCE